SINGAPORE: China and Iraq face a "critical" World Cup qualifying clash on Tuesday as Asia's big powers look set to step closer to the 2014 tournament in Brazil. Australia host Oman, Japan entertain Tajikistan and South Korea are at home to UAE in games the 'Big Three' should win easily as they march towards the fourth round. But China's match-up with Iraq is shaping as a tense affair after Zico, coach of the 2007 Asian champions, called it a must-win. The teams are level on points in Group A behind leaders Jordan with four rounds to play. "The situation of Iraq in the qualifiers is critical, we have no choice other than victory against China," the Brazilian legend warned. "China is good and well prepared team and will be playing at home. We have to be cautious but the players' confidence is sky-high." China coach Jose Antonio Camacho blasted his team as "lazy" and threaten...